Gyratory crusher



Jan. 18, 1955 s, w TRAYLOR, JR 2,699,900

GYRATORY CRUSHER Filed May 27, 1953 2 Sheets-Sheet l INVENTORMUELWTRAYLORJJR BY HIS ATTORNEYS Jan. 18, 1955 s w TRAYLQR, JR 2,699,900

GYRATORY CRUSHER Filed May 27, 1955 2 Sheets-Sheet 2 ////////////n/J/VINVENTOR SAMUEL W. TRAYLOR,JR.

BY H IS ATTORNEYS 2 hwm1/ /vwwr/ United States Patentf) GYRATORY CRUSHERSamuel W. Traylor, Jr., Allentown, Pa.

Application May 27, 1953, Serial No. 357,848

12 Claims. (Cl. 241-209) The present invention relates to new and usefulimprovements in gyratory crushers and more particularly to novel tiltingmechanism for a gyratory crusher which will permit the crushing head totilt upwardly about a fulcrum without appreciably changing the lateralposition of the bearing support at the upper end of the crushing shaft.I

Prior to the present invention in gyratory crushers of this type whereina spider or similar support for the upper gyrating shaft bearing iscarried by the tilting frame which supports the concave or head mantle,upward tilting of the concave due to non-crushable material entering thecrusher caused the upper shaft bearing to be moved laterally of thecrusher a substantial distance. This lateral movement of the upper shaftbearing, in turn, tilted the crushing shaft a substantial amount therebynecessitating the use of a universal connection between the crushingshaft and the drive mechanism for the crushing shaft substantiallyincreasing the cost of the crusher. In an effort to overcome this defectof prior crushers, separate frame members have been provided, eithersecured to an overhead support or mounted on the main frame of thecrushing machine, to support the upper crushing shaftbearingand preventlateral movement of this bearing upon upward tilting of the concave.This construction also considerably increased the cost and weight ofprior crushing machines of this type.

With the foregoingin mind, the principal object of the present inventionis to provide novel tilting mechanism for gyratory crushers which willpermit the concave to tilt upwardly about a fulcrum without appreciablychanging the lateral position of the bearing support for the upper endof the crushing shaft.

Another object of the present invention is to provide novel tiltingmechanism for gyratory crushers in which a spider or similar supportmember is carried by the tilting or movable frame and supports the uppertilting shaft bearing at a position in substantially the same plane asthe fulcrum of the movable frame so that tilting movemenfof the framewill not change the lateral position of the bearing support.

A further object of the present invention is to provide a novel gyratorycrusher wherein the concave may be adjusted with respect to the crushinghead without changing the position of the upper shaft hearing.

A still further object of the present invention is to provide a novelgyratory crusher and tilting mechanism having the features andcharacteristics set forth which is of relatively simplified constructionand entirely elficient and effective in operation and use.

These and other objects of the present invention and the variousfeatures and details of the operation and construction thereof arehereinafter more fully set forth and described with reference to theaccompanying drawings in which: V

Fig. 1 is a longitudinal sectional view of a gyratory crusher providedwith tilting mechanism made in accordance with the present invention;

Fig. 2 is an enlarged fragmentary longitudinal sectional view of thecrusher illustrated in Fig. 1 with the concave in its tilted or elevatedposition;

Fig. 3 is a fragmentary plan view taken on line 33,

Fig. 1 illustrating the means for adjusting the relative verticalposition of the concave;

Fig. 4 is an enlarged sectional view of the upper end 2,699,900 PatentedJan. 18, 1955 of the gyrating shaft and the supporting bearing in theirnormal operating position; and

Fig. 5 is a sectional view similar to Fig. 4 illustrating the relativeposition of the bearing with respect to the shaft when the concave hasbeen tilted upwardly.

Referring more specifically to the drawings and particularly Fig. 1thereof, reference numeral 10 designates generally a main frame membercomprising inner and outer generally concentric frame portions 11 and12, respectively, interconnected by a plurality of ribs 13. The outerframe portion 12 has an outwardly extending peripheral flange 14 thereonprovided with an annular V shaped groove 15 in the upper surface thereofwhich receives a correspondingly shaped downwardly extending flangeformed integrally with a movable frame. portion 16. The movable frameportion 16 is resiliently secured to the main frame by means of aplurality of adjusting bolts 17 which extend downwardly through themovable frame and main frame and hold a corre-, sponding plurality ofcompression springs 18 captive between the lower surface of the flange14 and a ring 19 carried by the bolts 17.

Extending upwardly through the inner frame portion 11 is a main shaft 21for the crusher which carries a crushing head 22 equipped with ahardened head mantle or crushing surface 23 formed of manganese steel orsimilar material. The lower end of the main shaft is journaled in aneccentric 24 which, when rotated, causes the shaft 21 to gyrate aboutthe central axis of the crusher. The longitudinal axis of the eccentricis offset from the longitudinal axis of the crushing machine and isdisposed at an angle thereto so that rotary movement or the eccentriccauses the crushing shaft to gyrate about the central axis of thecrusher. The eccentric 24 may be rotated in the conventional manner froma drive wheel exteriorly of the crusher, for example, by means of a pairof bevel gears as shown in Fig. 1 while the weight of the crushing shaft21 and crushing head 22 is supported by a step bearing 25.

Positioned upwardly adjacent the crushing head 23 concentric with thecentral axis of the crusher is a concave 26 which is supported by acrushing ring 27., The crushing ring 27 is threaded on its exteriorsurface, as indicated at 28, and engages similar threads 31 formed onthe inner surface of the movable frame portion 16. By this construction,the tilting frame 16 adjustably mounts the concave 26 and crushing ring27 so that the relative distance between the concave and crushing headmay be varied to control the size of the final product produced by thecrusher.

In accordance with the present invention, the upper end of the mainshaft 21 is received in a relatively loose fitting tapered bushing orbearing 32 having upwardly and outwardly diverging side wall portions,as shown in Figs. 4 and 5. During normal operation of the crusher, theside edge of the shaft 21 is parallel to the portion of the side wall ofthe bushing 32 at the point where the shaft engages the bushing so thatthe shaft 21 rotates in the bushing and engages the bushing with a linecontact. The bushing 32 in turn is carried by a spider 33 which issupported by the movable frame portion 16. The spider 33 consists ofinner and outer concentric ring portions 34 and 35, respectively,interconnected by a plurality of webs 36. The peripheral edge of theouter ring portion 35 is tapered, as indicated at 37, and is received ina correspondingly tapered portion 38 at the upper end of the movableframe 16.

In addition, the spider is interconnected with the crushing ring 27 toprevent upward displacement of the spider with respect to the movableframe portion 16. In the present instance, this is accomplished byproviding a plurality of bolts 41 which extend downwardly through the.

3 movable frame portion 16. However, the crushing ring 27 may beadjusted with respect to the movable frame portion 16 by loosening thebolts 41, rotating the spider and crushing ring, for example, by meansof conventional ratchet mechanism designated generally as 44 in Figs. 1and 3, and then again tightening the bolts 41.

An important feature of the present invention is the mounting of thebushing 32 in such a position that upward tilting of the movable frameportion 16 due to noncrushable material entering the crusher and beingjammed between the concave 26 and head mantle 23, will not cause thebushing 32 to be moved laterally of the crusher an appreciable distance.With reference to Fig. 2 if a piece of crushable material enters thecrusher, for example as indicated at 45, the concave 26 will bedisplaced upwardly with respect to the crushing head against thepressure of the springs 18 causing the movable frame portion 16 to tiltupwardly about the point P. Lateral movement of the bushing 32 duringthis upward movement of the tilting frame portion 16 would cause aconsiderable strain to be exerted on the crushing shaft 21 since theshaft is mounted in a fixed position with respect to the eccentric 24.To prevent this, the bushing 32 is supported in a position which issubstantially in the same horizontal plane as the point P, or plane ofthe fulcrum for the tilting frame, about which the tilting frame portionpivots, and thus the inner ring portion 34- .of the spider is disposedin a position substantially lower than the position of the outer ringportion 35. By this construction, upward tilting movement of the movableframe portion will cause the bushing 32 to be moved substantiallyvertically upward along the arc of a circle having its center at a pointP, for example, as shown in Fig. 2, and accordingly, the bushing 32 willbe moved from the position which it usually assumes with respect to theshaft 21, as shown in Fig. 4, to an upper position in which the axis ofthe bushing is substantially concentric with the axis of the shaft 21,as shown in Fig. 5. The bushing 32 has a relatively loose fit on theshaft, and thus will not bind or exert any undue pressure on the shaft.While the bushing is in this elevated position, the shaft 21 willcontact the inner lower periphery of the bushing instead of a portion ofthe side wall thereof.

To operate the crusher of the present invention, the material to becrushed is deposited in the usual manner on a conventional feed plate 46supported on top of the crushing shaft 21 which wobbles or tilts withgyratory motion of the shaft and thus drops the material depositedthereon between the crushing head and the concave. During the gyratorymotion of the shaft, any one portion of I the head mantle continuallymoves closer to the concave and then away from the concave to firstcrush the material between the concave and the head mantle and thenpermit the material to drop through the crusher, If a piece ofnon-crushable material is deposited in the crusher, the movable frameportion of the crusher will be displaced upwardly as this non-crushablematerial is caught between the head mantle and the concave to preventany undue strain on the shaft 21, the crushing head or the concave, andfurther rotation of the shaft 21 will permit the non-crushable materialto pass through the crusher without damage to the crusher.

From the foregoing it will be observed that the present inventionprovides novel tilting mechanism for gyratory crushers which will permitthe concave and supporting structure for the concave to tilt upwardlywhen noncrushable material enters the crusher without appreciablychanging the lateral position of the bushing which supports the upperend of the crushing shaft so that the crushing shaft is maintained inits desired position at all times. In addition, it will be observed thatthe present invention provides a novel crusher wherein the relativeposition of the concave with respect to the crushing head may beadjusted without changing the position of the bushing supporting theupper end of the crushing shaft.

While a particular embodiment of the present invention has beenillustrated and described herein, it is not intended to limit theinvention to such a disclosure and changes and modifications may beincorporated and embodied therein within the scope of the followingclaims.

I claim:

1. In a gyratory crusher comprising a stationary main frame member, atilting frame portion supported by said main frame and tiltable upwardlyrelative to the main frame about a fulcrum surface thereon, a crushingshaft mounted in said main frame for gyratory movement thereima crushinghead carried by said shaft, a concave carried by said tilting frame anddisposed for cooperation with said crushing head, a bearing supportfixedly mounted in said tilting frame and tiltable therewith, and abearing member carried by said support rotationally supporting the upperend of said crushing shaft substantially in the plane of the fulcrumsurface on the main frame so that lateral displacement of the crushingshaft upon upward tilting movement of the tilting frame and bearingsupport is substantially eliminated.

2. In a gyratory crusher comprising a stationary main frame member, atilting frame portion supported by said main frame and tiltable upwardlyrelative to the main frame about a fulcrum surface thereon, a crushingshaft mounted in said main frame for gyratory movement therein, acrushing head carried by said shaft, a concave carried by said tiltingframe and disposed for cooperation with said crushing head, a bearingsupport fixedly mounted in said tilting frame and tiltable therewith,and a hearing member carried by said support rotationally supporting theupper end of said crusher shaft substantially in the plane of thefulcrum surface on the main frame whereby upon upward pivotal movementof the tilting frame about said fulcrum, said bearing is moved upwardlyin a substantially vertical path.

3. In a gyratory crusher comprising a stationary main frame memberhaving an annular groove about the periphery of its upper surface, atilting frame portion supported by said main frame, said tilting frameportion having a downwardly extending flange thereon engaged in theannular groove of said main frame and tiltable upwardly relative to themain frame about a fulcrum surface in said annular groove, a crushingshaft mounted in said main frame for gyratory movement therein, acrushing head carried by said shaft, a concave carried by said tiltingframe and disposed for cooperation with said crushing head, a bearingsupport fixedly mounted in said tilting frame and tiltable therewith, abearing member carried by said support rotationally supporting the upperend of said crushing shaft substantially in the plane of the fulcrumsurface on the main frame whereby upon upward pivotal movement of thetilting frame about said fulcrum, said bearing is moved upwardly in asubstantially vertical path.

4. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member, a tilting frame portionsupported by said main frame and tiltable upwardly relative to the mainframe about a fulcrum surface thereon, a crushing shaft mounted in saidmain frame for gyratory movement therein, a crushing head. carried bysaid shaft, a crushing ring secured to said tilting frame portion forrelative adjustable movement vertically with respect to said tiltingframe, a concave carried by said crushing ring and disposed forcooperation with said crushing head, said concave being movablevertically upon adjusting movement of said crushing ring to control thesize of the crushed material, a bearing support fixedly mounted in saidtilting frame and tiltable therewith, a bearing member carried by saidsupport rotationally supporting the, upper end of said crushing shaftsubstantially in the plane of the fulcrum surface on the main framewhereby upon upward pivotal movement of the tilting frame about saidfulcrum, said bearing is moved upwardly in a substantially verticalpath.

5. In a gyratory crusher comprising a stationary main frame memberhaving an annular groove about the periphery of its upper surface, atilting frame portion supported by said main frame, said tilting frameportion having a downwardly extending flange thereon engaged in theannular groove of said main frame and tiltable upwardly relative to themain frame about a fulcrum surface in said annular groove, a crushinghead carried by said shaft, a crushing ring carried by said tiltingframe for relative adjustable movement vertically with respect to saidtilting frame, a concave fixedly secured to said crushing ring anddisposed for cooperation with said crushing head, said concave beingmovable with said crushing ring vertically upon adjusting movementthereof to control the size of the crushed material, spring meanspositioned about the periphery of said main frame resiliently urgingsaid tilting frame downwardly into engagement with said frame, a bearingsupport fixedly mounted in said tilting frame and tiltable therewith,and a bearing member carried by said support rotationally supporting theupper end of said crushing shaft substantially in the plane of i thefulcrum surface on the main frame whereby upon upward pivotal movementof the tilting frame about said fulcrum, said bearing is moved upwardlyin a substantially vertical path.

6. In a gyratory crusher comprising a stationary mam frame member, atilting frame portion supported by said main frame and tiltable upwardlyrelative to the main frame about a fulcrum surface thereon, a crushingshaft mounted in said main frame for gyratory movement therein, acrushing head. carried by said shaft, a concave fixedly secured to saidcrushing ring and disposed for cooperation with said crushing head, abearing support carried by said tilting frame and tiltable therewith,means interconnecting said bearing support with said concave to maintainsaid bearing support in engagement with said tilting frame, and abushing carried by said support rotationally supporting the upper end ofsaid crushing shaft substantially in the plane of the fulcrum surface onthe main frame whereby upon upwardly pivotal movement of the tiltingframe about said fulcrum surface said bearing is moved upwardly in asubstantially vertical path.

7. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member, a tilting frame portionsupported by said main frame and tiltable upwardly relative to the mainframe about a fulcrum surface thereon, a crushing shaft mounted in saidmain frame for gyratory movement therein, a crushing head carried bysaid shaft, a crushing ring mounted interiorly of said tilting frame forrelative adjustable movement vertically with respect to said tiltingframe, a concave fixedly secured to said crushing ring and disposed forcooperation with said crushing head, said concave being movablevertically upon adjusting movement of said crushing ring to control thesize of the crushed material, a bearing support fixedly mounted in saidtilting frame and tiltable therewith, means interconnecting said bearingsupport with said crushing ring to maintain said bearing support inengagement with said tilting frame, and a bushing carried by saidsupport rotationally supporting the upper end of said crushing shaftsubstantially in the plane of the fulcrum surface on the main framewhereby upon upwardly pivotal movement of the tilting frame about saidfulcrum surface said bearing is moved upwardly in a substantiallyvertical path.

8. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member having an annular grooveabout the periphery of its upper surface, a tilting frame portionsupported by said main frame, said tilting frame having a downwardlyextending flange thereon engaged in the annular groove of said mainframe and tiltable upwardly relative to the main frame about a fulcrumsurface in said annular groove, means resiliently urging said tiltingframe downwardly into engagement with said main frame, a crushing shaftmounted in said main frame for gyratory movement therein, a crushinghead carried by said shaft, a crushing ring mounted interiorly of saidtilting frame for relative adjustable movement vertically with respectto said tilting frame, a concave fixedly secured to said crushing ringand disposed for cooperation with said crushing head, said concave beingmovable vertically upon adjusting movement of said crushing ring tocontrol the size of the crushed material, a bearing support fixedlymounted in said tilting frame and tiltable therewith, meansinterconnecting said bearing support with said crushing ring to maintainsaid bearing support in engagement with said tilting frame, and abushing carried by said support rotationally supporting the upper end ofsaid crushing shaft substantially in the plane of the fulcrum surface onthe main frame whereby upon upwardly pivotal movement of the tiltingframe about said fulcrum surface said bearing is moved upwardly in asubstantially vertical path.

9. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member having an annular grooveabout the periphery of its upper surface, a tilting frame portionsupported by said main frame, said tilting frame having a downwardlyextending flange thereon engaged in the annular groove of said mainframe and tiltable upwardly relative to the main frame about a fulcrumsurface in said annular groove, means resiliently urging said tiltingframe downwardly into engagement with said main frame, a crushing shaftmounted in said main frame for gyratory movement therein, a crushinghead carried by said shaft, a crushing ring mounted interiorly of saidtilting frame in threaded engagement therewith for relative adjustablemovement vertically with respect to said tilting frame, a concavefixedly secured to said crushing ring and disposed for cooperation withsaid crushlng head, said concave being movable vertically upon adjustingmovement of said crushing ring to control the size of the crushedmaterial, a bearing support fixedly mounted in said tilting frame andtiltable therewith, means interconnecting said bearing support with saidcrushing ring to maintain said bearing support in engagement with saidtilting frame, and a bushing carried by said support rotationallysupporting the upper end of said crushing shaft.

10. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member having an annular grooveabout the periphery of its upper surface, a tilting frame portionsupported by said main frame, said tilting frame having a downwardlyextending flange thereon engaged in the annular groove of said mainframe and tiltable upwardly relative to the main frame about a fulcrumsurface in said annular groove, spring means positioned about theperiphery of said main frame resiliently urging said tilting framedownwardly into engagement with said main frame, a crushing shaftmounted in said main frame for gyratory movement therein, a crushinghead carried by said shaft, a crushing ring mounted interiorly of saidtilting frame in threaded engagement therewith for relative adjustablemovement vertically with respect to said tilting frame, a concavefixedly secured to said crushing ring and disposed for cooperation withsaid crushing head, said concave being movable vertically upon adjustingmovement of said crushing ring to control the size of the crushedmaterial, a bearing support fixedly mounted in said tilting frame andtiltable therewith, means interconnecting said bearing support with saidcrushing ring to maintain said bearing support in engagement with saidtilting frame, and an upwardly diverging tapered bushing carried by saidsupport rotationally supporting the upper end of said crushing shaftsubstantially in the plane of the fulcrum surface on the main framewhereby upon upwardly pivotal movement of the tilting frame about saidfulcrum surface said bearing is moved upwardly in a substantiallyvertical path so that lateral displacement of the crushing shaft issubstantially eliminated.

11. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member, a tilting frame portionsupported by said main frame and tiltable upwardly relative to the mainframe about a fulcrum surface thereon, said tilting frame having acircumferential flange on the upper surface thereof tapered upwardly andoutwardly of the tilting frame, a crushing shaft mounted in said mainframe for gyratory movement therein, a crushing head carried by saidshaft, a crushing ring mounted interiorly of said tilting frame inthreaded engagement therewith for relative adjustable movementvertically with respect to said tilting frame, a concave fixedly securedto the crushing ring and disposed for cooperation with the crushinghead, said concave being movable vertically upon adjusting movement ofsaid crushing ring to control the size of the crushed material, abearing support carried by said tilting frame and tiltable therewith,said bearing support having its outer peripheral surface tapered tocorrespond to the tapered flange of said tilt ing frame, and a pluralityof bolts interconnecting said bearing support and said crushing ringoperable to pull the bearing support downwardly into engagement with thetapered flange and the crushing ring upwardly into engagement with thetilting frame threads.

12. In a gyratory crusher operable to crush material to a predeterminedsize comprising a stationary main frame member, a tilting frame portionsupported by said main frame and tiltable upwardly relative to the mainframe about a fulcrum surface thereon, said tilting frame having acircumferential flange on the upper surface thereof tapered upwardly andoutwardly of the tilting frame, a crushing shaft mounted in said mainframe for gyratory movement therein, a crushing head carried by saidshaft, a crushing ring mounted interiorly of said tilting frame inthreaded engagement therewith for relative adjustable, movementvertically with respect to said tiltin f me, s i thr aded, engagementcem- Pris g hreads on the tilting fr me having heir. lower surfacesbeveled downwardly and outwardly of the tilting frame and threads on thecrushing ring having their upper surfaces beveled to correspond with thebevel of the tilting frame threads, a concave fixedly secured to thecrushing ring and disposed for cooperation with the crushing head, saidconcave being movable vertically upon adjusting movement of saidcrushing ring to control the size of the crushed material, a bearingsupport carried by said tilting frame and tiltable therewith, saidbearing support having its outer peripheral surface tapered tocorrespond to the tapered flange of said tilting frame, a plurality ofbolts extending through said bearing support and threaded into saidcrushing ring operable to pull the bearing support downwardly into enagement withthe tapered flange and the crushing ring upwardly intoengagement with the beveled surfaces on the tilting frame threads, andan upwardly diverging tapered bushing carried by said supportrotationally supporting the upper end of said crushing shaftsubstantially in the plane of the fulcrum surface on the main framewhereby upon upwardly pivotal movement of the tilting frame about. saidfulcrum surface bearing is moved upwardly in a substantially verticalpath so that. lateral displacement of the crushing shaft issubstantially eliminated.

No references cited.

